<template>
  <div class="wrapper" ref="wrapper">
    <div class="content">
      <slot></slot>
    </div>
  </div>
</template>

<script>
import BScroll from "@better-scroll/core";
import Pullup from "@better-scroll/pull-up";
import ObserveDOM from "@better-scroll/observe-dom";
import MouseWheel from "@better-scroll/mouse-wheel";

BScroll.use(Pullup);
BScroll.use(ObserveDOM);
BScroll.use(MouseWheel);

export default {
  name: "Scroll",
  props: {
    probeType: {
      type: Number,
      default: 0,
    },
    pullUpLoad: {
      type: Boolean,
      default: false,
    },
  },
  data() {
    return {
      scroll: null,
      message: "sad",
    };
  },
  mounted() {
    // 1.创建BScroll对象
    this.scroll = new BScroll(this.$refs.wrapper, {
      probeType: this.probeType,
      observeDOM: true,
      click: true,
      mouseWheel: true,
      pullUpLoad: this.pullUpLoad,
    });
    // 2.监听滚动位置
    if (this.probeType === 2 || this.probeType === 3) {
      this.scroll.on("scroll", (position) => {
        // console.log(position);
        this.$emit("scroll", position);
      });
    }

    // 3.监听上拉事件
    if (this.pullUpLoad) {
      this.scroll.on("pullingUp", () => {
        // console.log("上拉加载更多");
        this.$emit("pullingUp");
      });
    }
  },
  methods: {
    scrollTo(x = 0, y = 0, time = 500) {
      this.scroll && this.scroll.scrollTo && this.scroll.scrollTo(x, y, time);
    },
    finishPullUp() {
      this.scroll.finishPullUp();
    },
    refresh() {
      this.scroll && this.scroll.refresh && this.scroll.refresh();
    },
    getScrollY() {
      return this.scroll ? this.scroll.y : 0;
    },
  },
};
</script>

<style scoped></style>
